222120212120 has 128 divisors (see below), whose sum is σ = 539010892800. Its totient is φ = 82113647616.

The previous prime is 222120212087. The next prime is 222120212143. The reversal of 222120212120 is 21212021222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11170427 + ... + 11190293.

It is an arithmetic number, because the mean of its divisors is an integer number (4211022600).

Almost surely, 2^222120212120 is an apocalyptic number.

222120212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222120212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269505446400).

222120212120 is an abundant number, since it is smaller than the sum of its proper divisors (316890680680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222120212120 is a wasteful number, since it uses less digits than its factorization.

222120212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20257 (or 20253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222120212120 its reverse (21212021222), we get a palindrome (243332233342).

It can be divided in two parts, 2221202 and 12120, that added together give a palindrome (2233322).

The spelling of 222120212120 in words is "two hundred twenty-two billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty".